else procedure undefined?

If what you were trying to do with the else is to provide a "default" clause for the switch statement (ie. everything that doesn't match one of your previous comparisons), then you can make use of the built-in "default" keyword in the switch statement. "else" is part of the "if" clause, not switch.

Oh, and Deb is right that you'll probably want wildcards if you want your comparison to be like the "starts_with" operator.

when HTTP_REQUEST {
  switch -glob [string tolower [HTTP::uri]] {
    "/affiliates*" -
    "/endpages*" -
    "/friends*" -
    "/images*" -
    "/img*" -
    "/inc*" -
    "/includes*" -
    "/maintenance*" -
    "/outage*" -
    "/popup*" -
    "/referral*" -
    "/sc*" -
    "/servicestudy*" -
    "/sitemap*" -
    "/thrivent*" -
    "/upgrade*" -
    "/userControls*" {
      pool Pool1
    }
    default {
      HTTP::redirect "http://blahblah.com"
    }
  }
}

-Joe